Hybrid Wind Generator

“The Wind Energy” innovation for your home and company

History

The project began in January 2011, by the desire to develop a space-saving resource of clean and renewable energy.

The idea of designing a generator, suitable to the demands that emerge from the international market was born. At that moment the first 3,5 KW engines appeared.

At the Politecnico University of Milan we continue to perform a series of tests in the wind tunnel for simulations and performance optimisation. The tests gave excellent results.

This is how the Ecolibri 3,5 and 9,9 Kw vertical hybrid micro wind generators were born.

Specification

Dimensions and materials

Sail diameter

3.500 mm

Sail height

3.700 mm

Swept area sm

12.950

Blade material

Aluminium

Arms material

Aluminium

Number of sails

3

Sail and generator weight

213 kg

Warranty

Standard warranty

2 years

Extended warranty

2 years

Technical data

Power / Wind speed

3,4 kW a 12 m/s

Start up wind speed (cut in)

3 m/s

Start production speed

4 m/s

Shut down speed (cut off)

16 m/s

Generator rated power

3,4 kW/ 250 rpm

Generator max power

4.000 Watt

Generator rotation speed

250 rpm

CE Certification

Yes

Transmission type

Direct

Electromachanical brake

Yes

Assisted starter

Yes

Controller brakin

Yes

Perfomance

Specification

The key feature of the micro wind turbine ECOLIBRI’ is to have an environmental impact which is completely irrelevant, even in the context of a mini wind turbine camp consisting of more turbines.

The shape, unique in its kind, makes the turbines minimally invasive both for their small size and for the chance to be painted with colours that reflect the surrounding environment.

Noise

The noise of the wind blades ECOLIBRI is undetectable (<20Db) even in the presence of strong winds, as the blades cannot rotate at a higher speed than the wind itself and consequently do not cause any kind of hiss and noise.

Stand Alone Energy Storage Solution

Let us know more about your needs so we can study and offer the best custom stand-alone energy solutions.

The hybrid micro wind turbines with vertical axis Ecolibri 3,5 and 9,9 kW are studied for a “stand alone” use where the power grid is not available. The obtained energy will be stored in batteries and will at your disposal 24 hours a day.

The anemometric station must be positioned where the turbine will be installed. At this point, it is essential to check the site in order to avoid possible wind turbulences caused by the morphology of the terrain.

Rooftop installations are more complex than ground ones. During the project evaluation you need to consider the following factors:

m2 roof payload;

main wind direction;

building resonance frequency;

building maximum lateral

Resonance frequency happens when an object excites the frequency of its own structure (pole, building). Every structure has its frequency. If frequencies overlap, they can increase their energy by 100 times, and in some cases that can break the structure.

In case of a rooftop installation it is advisable to use a structure that distributes the forces evenly (lateral pression, torsion, and weight) because most of the times the building frequency is unknown.

The structure should be stiff in order to push the resonance point beyond its breaking point. The resonance can be avoided by slowing the rotation down. Ecolibrì provides every installation with a triaxis sensor configured on certain tolerance thresholds that slow down the turbine rotation when the limit is exceeded. Ecolibrì’s priority is to guarantee the installation safety.

the rules and standards set by each country in respect with the guidelines set by the European Union in terms of infrastructure safety;

geological report of the

The turbine manufacturer has to provide the civil engineer with all the turbine data (area, weight, rotation speed, pole structural calculation). Alongside with these data, a valid geological report has to be attached. Ecolibrì standard plinths are calculated according to the IEC 61400-2 “Wind Turbines – Part 2: Design requirements for small wind turbines” international norm.

Turbine positioning is very important in order to guarantee maximum efficiency in energy production. If the turbines face the wind the distance between them must be at least three times the turbine diameter (measured from wing to wing not pole to pole). If turbines are installed one behind each other, the minimum distance required is ca. 10 times the turbine height (rotor). If the turbine position does not follow a straight line, the distance can be reduced (5 times the height).